Aeroplane



Sept. 11, 1928.

J. c. ELGER AEROPLANE Filed Dec. 20, 1927 126.4 I) h /4 If /7 DUDE] E] Patented Sept. Ill, 1928.

UNITED STATES.

PATENT OFFICE.

JOSEPH CARL ELGER, F PITTSFIELD, MASSACHUSETTS.

Maori-Ann.

. Application filed December 2 and assure perfectly safe landing.

"the appended claims.

Another object is to' provide a construction which will simplify and reduce the cost of manufacture of an aeroplane.

With this and other 'objectsin view my invention consists of the novel construction, combination and arrangement of parts as will be hereinafter more fully described in In the accompanying drawing which forms part of this specification and in which a similar reference characters denote corre sponding arts,Fig. 1 is a side elevation of my aerop ane; Fig. 2 a bottom plan view thereof; Fig. 2 a cross sectional view of the fuselage; Fig. 3a longitudinal section on line 33 of Fig. 2, of the aeroplane and Fig.

4: a cross section thereof on line of Fig.3.."'

The aeroplane according'to this invention comprises a dart shaped body 10 which may be made of a flat sheet of metal of substantially rectangular shape having a pointed edge at one end and bent alternately up and 'down transversely as best shown dia rammatically'inFig. 2 to form at suitab le'intervals a plurality of longitudinal parallel downwardly extending flutes ll, 12 and 13 closed at their sides and bottoms, the spaces 14: between the individual flutes forming tunnels or channels. One of the flutes, 12, extends along the central longitudinal line" "of the flat surface and the others 11, 13am symmetrically distributed on both sides of said central flute. Each flute has vertical side walls and rounded bottoms 11, 12 13%; The tops 5 of the channels 14: are flat. The flutes staging from the pointed edge, where they are the shallowest, gradually increase in depth toward the rear end of the surface and there are closed by. slanting walls ll freight "etc, and is made the widest and deepest, while the lateral flutes do-not extend as far down and may bejnarrower, .as-

' wardly slanting 0,1927. Serial No. 241,294.

shown. The central, flute is provided on its,

top with a covering or hood 16 substantially of the shape shown, which projects above the flat surface: from the front edge of the plane to' an intermediate point thereof and at its rear slants downwardly as at 16' and is extended to the rear end of the .top as at 16 to form the top for the deepest partof the flute 12. The side and front walls of the hood may be provided with windows 15 and a cockpit 17 or the like.

The flanking parts 15 of the flat surface, as Well as the lateral flutes and channels serve to stabilize the plane and prevent it from tipping sidewise during flight, raise it when propelled forwardly and keep up the tendency of the plane to move forwardly when the drivin bottom of the channel ow- 1ng.to the pressure of the air from below 0 power ceases. The rearagainst the same have the effect of raising ive power is disconthe ,plane while in flight and permitting" it to glide when the mo tinued.

The flutes. 11, 13 when closed on top as shown may be filled with air or gas rendering the plane buoyant. Instead of closing said flutes, there may be separate tanks (not shown) mounted therein to contain a medium rendering the ship buoyant.

On. top of the ondola or hood and at other places of the latter have their openings directed toward at surfacefunnel shaped members or sails 18 may be provided. The

their rear and serve to aid in the propulsion of the plane when travelling in the'direction.

of the wind. Rudders 19, 19' may advantageously be accommodated in the channels 14 and below the flanking surfaces. 20 de-. notes the usualwings or supportingplanesn .WhatIclaim is: w

e 1. In an aeroplane, a fuselage or body formed of a flat piece of rigid material provided with a number of longitudinally ex: tending tubular flutes spaced apart and projecting below the surface, the spaces between said flutes forming tunnels or channels, said flutessfibeingmade to gradually increase in depth toward the rear, the .central flute ,be-

ing provided with a hood and serving as a compartment-or gondola whiledhe lateral ioo flutes and channels serve toystabilize the I lateral tipping,

plane in flight, preventing1 v h promoting t e assuring. safe landing an forward propulsion of the aeroplane as well as gliding, the partition of the are below the plane surface by single arrowlike walls forming tunnels or channels of which the or by hollow tubes as shown in the drawings. central one serves as a compartment for the 2. In an aeroplane, a fuselage or body crew and the lateral ones serve to stabilize 19 formed with a number of longitudinal parthe plane in flight, 5 allel flutes spaced apart and projecting in a In testimony whereof I aflix my signature.

rearwardly inclined position below the surface thereof, the spaces between said. flutes JOSEPH CARL ELGER. 

